/ 
Template-Toolkit-0.24
/ Template::Plugin::Filter
Security Advisories (1)
CVE-2026-5090 (2026-05-19)

Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in <a id='ref' title='[% var | html %]'> would not be properly escaped. An attacker could insert some limited HTML and JavaScript, for example, var = " ' onclick='while (true) { alert(1) }'" Note that arbitrary HTML and JavaScript would be difficult to inject, because angle brackets, ampersands and double-quotes would still be escaped.

NAME

Template::Plugin::Filter - plugin implementing filtering functions

SYNOPSIS

[% FILTER html %]
   x < 10 && y != 0
[% END %]

[% FILTER format('<!-- %-40s -->') %]
This will end up formatted, line-by-line,
as HTML comments...
[% END %]

DESCRIPTION

The Filter plugin module defines filters for the FILTER directive.

The 'html' filter converts the characters '<', '>' and '&' to '&lt;', '&gt;' and '&amp', respectively, protecting them from being interpreted as representing HTML tags or entities.

The 'format' filter takes a format string as a parameter (as per printf()) and formats each line of text accordingly.

AUTHOR

Andy Wardley <cre.canon.co.uk>

REVISION

$Revision: 1.4 $

COPYRIGHT

Copyright (C) 1996-1999 Andy Wardley. All Rights Reserved. Copyright (C) 1998-1999 Canon Research Centre Europe Ltd.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

Template::Plugin,